Web winding



Oct. 31 1944. O. c. ROESEN WEB WINDING Filed July 16, 1943 INVENTOR BY ml, 314M! M 'HUATTORNEY5 was or, rest 2,3til,i95

l /WE @scar C. Roesen, Scarsdaic, N. 1., assignor to Wood Newspaper Machinery iilorporation,

This invention relates to web rolls and more particuiarly concerns an improved method of and apparatus for winding successive rolls from a continuous web of relatively thin flexible ma- I terial such as paper, fabrics, or the like.

Large web rolls are customarily wound from the web issuing from a paperor other web-main ing machine, or from web drawn from a master roll. To expedite this operation, it is necessary that when a given roll is completely wound, the continuous web running to it be severed and the severed end started around a core to wind another roll, and this should be accomplished without stopping or materially retarding the movement of the web. Previously lmown methods and apparatus for performing operations of this nature have been complicated or uncertain and it is the object of the present invention to provide animproved and simplified method and apparatus for simultaneously severing the web running to a roll and starting the severed web end around a core to commence winding another roll, all while the web is traveling at full speed. Another object of the invention is to provide a method and apparatus of this nature in which the web issevered so close to the point thereon where it is started around the new roll core that no appreciable baclrfold or tell is left at the core surface. The method and apparatus of the invention is also useful in applying a layer of ad hesive to an area of the web adjacent its-core end while the web is being wound. Such an adhesive layer is useful in splicing the core end of the web to the ieading'end of the web on a new roll so as to continuously feed web from successive rolls to a printing press or other web consuming apparatus, as for example, in accordance with the method disclosed and claimed in my Patent No. 2,320,656 entitled Web roll changing.

In general, the above and other objects of the invention are carried out by running the continuously moving web being wound into a. roll over.

and at a point close to the core surface, and then applying adhesive to the core or to the core contacting surface of the web approaching the core, whereby a section of the web is stuck to and lifted by the core and the web traveling beyond the core toward the completed roll is moved against the knife and severed thereby. This application is a continuation in part of my copending application Serial No. 482,586, filedApril 10, 1943, entitled Web splicing.

The invention will be best understood by ref.- 7

erence to the accompanying drawing where centain embodiments thereof have been illustrated. In the drawing;

Fig, i is a diagrammatic elevation of web roll winding apparatus embodying my invention and capable of performing my method;

Fig. 2 is an elevation of the roll winding apparatus of Fig. l at the instant that the web is being started on a new core;

Figs. 3 and 4 are elevations illustrating the operation of the roll winding apparatus in transferring a newly started core to the roll winding position;

Fig. 5 is afragmentary elevation illustrating a modified arrangement of the adhesive applying means; and

Fig. 6 is a view similar to Fig. 5 showing the application of adhesive to-the core rather than to the web.

Referring to Fig. 1, 6 represents a web of paper or. any other relatively thin flexible material which may, for example, comprise the paper web issuing from the final calender of a paper-mak ing machine. The web ii travels around a guide roll I, through a drying oven 8 Where it issupported by suitable means such as the rollers 9, under a guide roll ill to a roll winding device designated as a whole as R.

The roll winding device R winds the web 6 into a succession of web rolls of the desired size, and

the present invention has to do primarily with an improved means and method for transferring the traveling web from a fully wound roll to a core to start the winding of a new roll. The winding device shown in the illustrated embodiment is in some respects similar to the device generally known in this art as a Pope rewinder, one form of which is shown in the Pope Patent No. 1,248,542, dated December 4, 1917.

The device R, shown includes an under roll or upper ends of the arms are bifurcated as shown at M. The arms i3 extend downwardly beyond the pivot point and are releasably engaged at their lower ends by a suitable yielding support. As shown, this support may comprise a rod |5 having the angularly bent end removably secured in a notch H; at the lower end of the arms l3, the rod being slidably carried in a tubular member I! that is pivotally supported at l8. A spring |9 resists movement of the rod l5 into the tubular member l1. The yielding support may be provided in duplicate with one unit for each arm of the pair l3. It will be apparent that with this arrangement, the arms of the pair I 3 may move to a limited extent about the axis of the drum l in the direction of rotation of the drum as indicated by the arrow, but are normally maintained in the position shown. Also, by moving the rod l5 out of engagement therewith, the arms l3 may be freely moved about their pivots.

Another pair of parallel rigidly connected roll core arms I9 is provided for carrying the rolls in the winding position. As shown, the arms l9 are pivotally secured to the frame l2 near the end thereof toward which the web moves, and the ends of the arms are bifurcated as shown at to receive roll core journals. Two roll cores 2| and 22 successively cooperate with the drum H to wind the web rolls. The cores 2| and 22 have journals 23 and 24, respectively, which fit the bifurcated ends l4 and 20 of the arms l3 and i9. A knife or other web severing means 25 is carried by a suitable frame 26 pivoted to a fixed shaft'Zl. When the support 26 is lowered as shown to a position fixed by the adjustable stop 28 the knife 25 extends transversely across and close to the upper surface of the web 6 where it leaves the roll core 2|. In this position, the knife 25 is close to the surface of the core 2|. The pivoted support permits movement of the knife 25 to a retracted position when it is desired to move or change the roll core 2|, as shown in .Fig. 3.

Suitable yielding tension means are provided for permitting limited variations in the speed of travel of the web 6 approaching the drum H. In the disclosed embodiment, this takes the form of a yieldably mounted roller 29 engaging the upper surface of the web 6 where it approaches the drum As shown, the roller 29 may be carried in lidably mounted journal boxes 30 that are biased by the springs 3| to the position shown in Fig. 1. When the web 6 on the drum H is momentarily accelerated as an incident to shifting it to a new roll core as hereinafter described, the roller 29 rises against the force of the springs 3| to permit shortening of the span of the web, as shown in Fig. 2, and tearing or stretching of the web may be thereby avoided. When the web material i extensible without breakage or injury, the yielding tension means described may be dispensed with.

Suitable means are provided for applying adhesive to the roll core contacting surface of the web 6 approaching the drum The adhesive applied may be an ordinary tacky adhesive such as rosin glue or any other suitable known glue or paste. In accordance with one aspect of the invention, the adhesive applied is a self-sticking adhesive of the type described in detail in my Patent No. 2,320,656. This type of adhesive,

which will be'hereinafter referred to as a selfsticking adhesive, is of the nature of a rubber cement. As explained in my aforesaid application, this self-sticking adhesive has the property of adhering tenaciously to the paper or other web when applied thereto in liquid form and dried thereon, but when dried its exposed surface does not adhere to an uncoated web or other surface. The dried self-sticking adhesive coatings cohere tenaciously with similarly applied and dried coatings, so that when two surfaces bearing such coatings contact each other they are firmly stuck together.

Adhesives of either conventional or self-sticke ing type may be applied by any suitable means to the core contacting surface of the Web 6 before it reaches the core 2| or to the surface of the core.

A shown in Fig. l, adhesive may be sprayed from a container 32 through a slot or nozzle 33 extending transversely of the upper surface of the web 6, the flow of adhesive being controlled by suitable means such as the valve 34,. When a self-sticking adhesive is so applied, it may be dried on the web surface by passing the coated web through-a suitable oven 8 which may be heated by hot air currents, electrical heating elements or any other known means. When ordinary tacky adhesive is used, the oven 8 may be from the roll core 2| to permit drying of the adhesive between the point of application and the roll core. Such an arrangement has been illustrated in Fig. 5, where the adhesive is sprayed from a container 35 through a nozzle 36 under control of a, valve 31 at approximately the point where the. web 6 first engages the drum Ordinary tacky adhesive may be applied to the surface of the roll core 2| rather than to the surface of the approaching web. This arrangement has been illustrated in Fig. 6, where adhesive is sprayed from a container 45 through a nozzle 46 under control of a valve 41 onto .the surface of the core 2| approaching the upper surface of the web 6 passing under the core.

When ordinary tacky adhesive is used, it may, of course, be applied to the web at any point in its travel prior to that at which the web passes under the core 2 The operation of the disclosed embodiment of my improved apparatus in carrying out my method will now be described. The web 6 runs over the rotating drum I I and is wound into a roll 38, the core 22 of which is supported by engagement of its journals 24 with the bifurcated ends 20 of the arms I9. In this position, which is herein termed the roll winding position, the roll 38 is propelled in the direction indicated by the arrow by surface contact with the rotating drum ll. While the roll 38 is being wound, a new roll core 2| is placed in the starting position as shown in Fig.1 with its journals 23 held in the bifurcated ends M of the arms l3. When a self-sticking adhesive is employed, the entire cylindrical surface of the core 2| bears a dried coating of this material as indicated at 39. If ordinary tacky adhesive is used no adhesive layer is carried by the core 38. The knife frame 26 is lowered to the position shown in Fig. 1 after the core 2| i in applies a layer of adhesive to the surface of the core 2i or to the upper or core contacting surface of the web 6 before it reaches the core N. This may be accomplished by opening the valve 34 for a suitable interval. When a self-sticking adhesive is employed, it may be dried in the oven 8 or, if it is dissolved in a highly .voltatile solvent, it may dry in the atmosphere and may be applied with either the arrangement of Fig. 1 or that of Fig. 5. A tacky adhesive may be applied to the core it as illustrated in Fig. 6. When the section of the web bearing the applied adhesive passes under the ro.l core 2i. or the adhesive bearing surface of the core contacts the web, the web is stuck to the core and continues around its cylindrical surface so that the span of the web between the roll core 2i and the roll it is lifited oil of the surface of the drum H. as shown in Fig. 2. This moves the web it into the knife and severe the web close to the surface of the core 23. The web end is accordingly carried around the core 2i and the winding of a new roll on this core is thus started.

Instead of applying the adhesive directly to the web surface, it may be applied by sticking a prepared sheet bearing the adhesive to the upper surface of the web It as it approaches the roll winding apparatus R. The prepared sheet thus applied may bear either conventional or selfsticking adhesive on its outer surface and may be stuck to the web by ordinary tacky adhesive. Apparatus suitable for so applying an adhesive hearing sheet to a moving'web and a method for performing this operation are described and claimed in my copending application Serial No. 414,274, filed October 9, 1941, entitled Application of prepared adhesive to webs.

When self-sticking adhesive is employed. the uncoated upper surface of the web 6 passing under the core it does not stick thereto because of the above described properties of the dried self-sticking adhesive layer 39 on the core surface, but as soon as the applied and dried layer of this adhesive on the web b contacts the laver it on the core 2f, the web is firmly stuck to the till core. The arrangement of the knife 25 close to the surface of the core 2i insures that the web 6 is cut close to the point where it is stuck on the core surface, and no appreciable end or tail of the web is left to form a backfold and so disturb the even winding of the web on the core.

The lifting of the web between the new core 2i and the roll 38 tends to both momentarily accelerate the web approaching the core 2! and shorten the web span between the roll 38 and the core 26.. When the web material is extensible it merely stretches over this span. With inextensible webs, breakage or injury is avoided by movement of the core 25 circumferentially of the drum l l in the direction of web travel against the bias of the springs It and by yielding of the tension roller 29, as shown in Fig. 2 and described above.

After the web 6 has started around the new core ii, the completed roll as is removed from the arms l a, the yielding support is disconnected from the arms is by moving the end of the rod I5 out of the notch 06 as explained above, and the arms is are swung in the direction of web travel until the journals 23 of the core 2i rest in the bifurcated ends 2@ of thearrns id as shown in Fig. 3. This transfers the core 2i to the winding position, and as the new roll dil builds up, the core journals as are lifted out of the bifurcated ends it of the arms is, whereupon these arms may be returned to the starting position ready to receive the next roll core, as illustrated in Fig. 4.

When the web being wound is to be employed in splicing operations such as that described and 'claimed in my aforesaid application Serial No.

403,515, now Patent No. 2,320,656, it is necessary that a layer of self-sticking adhesive of considerable extent be applied to a section of the web at the core end of each roll. As explained in my aforesaid application, this layer of adhesive should extend longitudinally of the web by a distance at least equal to the circumference of the largest new web roll employed. The method and apparatus of the present invention are particularly useful in preparing webs of this nature. The required core end layer of self-sticking adhesive may be easily applied by merely continuing the application of this adhesive to the web for an interval such that the required length of web is coated. The leading end of this coating acts as has been described to cause the severing of the web and the starting of its end around a new core, A length of coated web equal to the circumference of the web roll core is consumed for this purpose. and the remainder of the coated section of the web constitutes the core end selfsticking adhesive layer that acts in the web splicinc method of my aforesaid invention.

I claim:

i. The method of transferring a moving flexible web running to a web roll being wound to a core to start the winding of another web roll which comprises bringing a rotatable roll core into contact with the surface of the web running to the roll whereby the core is accelerated to web speed, positioning a knife across the web adjacent the core contacting surface of the web where it leaves the core, and applying adhesive to the core con-' tacting surface of the web approaching the core whereby the web is stuck to the core and the part of the web traveling away from the core is moved into contact with the knife and severed.

2. The method of transferring a moving flexible web running to a web roll being wound to a core to start the winding of another web roll which comprises moving the web approaching the web roll being wound over a support, bringing a rotatably mounted roll core into contact with the upper surface of the web on such support whereby the core is accelerated to web speed, position-. ing a knife across and adjacent the upper surface of the web where it passes from under the core and applying adhesive to the upper surface of the web approaching the core whereby the web is stuck to the core as it passesthereunder and the web leaving the core is lifted into the knife and severed.

' 3. The method of transferring a moving flexible web running to a web roll being wound to a core to start the winding of another web roll which comprises moving a web approaching the web roll being wound over a support that moves at substantially web speed, moving the cylindrical surface of a rotatable roll core into contact with the upper surface of the web on said support with the axis of the core extending transversely of the web whereby the core surface is accelerated to web speed, positioning a knife across and adjacent the upper surface of the web where it passes from under the core, and applying adhesive to the upper surface of the webapproaching the core whereby the web is stuck to the core as it passes thereunder and the web beyond the core is lifted into the knife and severed.

4. The method of transferring a moving flexible web running to a web roll being wound to a core to start the winding of another web roll which comprises moving a web approaching the web roll being wound over a support, bringing the cylindrical surface of a rotatable roll core carrying an applied and dried coating of,self-sticking adhesive into contact with the upper surface of the web on the support with the axis of the core extending transversely of the web whereby the core is accelerated to web speed, positioning a knife across and adjacent the upper surface of the web where it passes from under the core, and applying and drying a layer of self-sticking adhesive on the upper surface of the web approaching the core whereby when the adhesive layer carrying portion of the web passesunder the core the web is stuck to the core and carried around the cylin drical surface thereof, and the web beyond the core is lifted into the knife and severed.

5. The method of transferring a moving flexible web running to a web roll being wound to a core to start the winding of another web roll which comprises bringing a rotatable roll core into contact with the surface of the web running to the roll whereby the core is accelerated to web speed, positioning a knife across the web adjacent the core contacting surface of the web where it leaves,

the core, and applying adhesive to at least one of the contacting surfaces comprising the web and the core whereby the web is stuck to the core and the part of the web traveling away from the core is moved into contact with the knife and severed.

6. The method of severing a running web and starting the severed end thereof around a core to wind the web into a roll which comprises moving the cylindrical surface of a rotatable core into contact with the running web whereby the core surface is acceleratedto web speed, holding the severing means across and close to the core contacting surface of th web leaving the core and applying adhesive to the core whereby the web is stuck to the core and the part thereof leaving the core is moved into the severing means and severed.

'7. Apparatus for transferring a moving flexible web to a roll core to start the winding of a web r011 while the web is traveling to a roll that is being wound comprising means for supporting the-web traveling to the roll, means for rotatably supporting a roll core with its cylindrical surface in contact with the moving web on said support and its axis extending across the web, a knife extending across the web adjacent its core contacting surface and close to the point where the web leaves the core, and means for applying adhesive to the core contacting surface of the web approaching the core.

8. Apparatus for transferring a moving flexible web to a roll core to start the winding of a web roll while the web is traveling to a roll that is being wound comprising a surface moving at web speed for supporting the web traveling to the roll, means for rotatably supporting a roll core with its cylindrical surface in contact with the upper surface of the moving web on said moving surface and its axis normal to the path of travel of the web, a knife movable to a position adjacent the core and across the core contacting surface of the web leaving the core, means permitting limited movement of the core along the web in the direction of web travel, and means for applying adhesive to the core contacting surface of the web approaching the core.

9. Apparatus for transferring a moving flexible assists web to a roll core to start the winding of a web roll while the web is traveling to a roll that is being wound comprising a rotating drum for supporting the web traveling to the roll being wound, means for rotatably supporting a roll core with its cylindrical surface extending across and in contact with the upper surface of the moving web on the drum, a knife adjacent the core extending across and close to the upper surface of the web leaving the core, means permitting limited movement of the core circum ferentially of the drum in the direction of web travel, and means for. applying adhesive to the upper surface of the web before it reaches the core.

- 10. Apparatus for transferring a moving flexible web, to a roll core to start the winding of a web roll while the web is traveling to a roll that is being wound comprising a rotating drum for supporting the web traveling to the roll being wound, means for rotatably supporting a roll core with its cylindrical surface extending across and in contact with the upper surface of the movin web on the drum, a knife adjacent the core extending across and close to the upper surface of the web leaving the core, means permitting limited movement of the core circumferentially of the drum in the direction of web travel, means for applying adhesive to the upper surface of the web before it reaches the core, and yielding tension means for the web approaching the drum for permitting limited changes in the speed of the web on the drum.

11. Apparatus for transferring a moving flexible web to a roll core to start the winding of a web roll while the web is traveling to a roll that Q is being wound comprising means for supporting the web traveling to the roll being wound, means for rotatably supporting a roll core with its cylindrical surface extending across and in contact with the upper surface of the web on the support, a layer of dried self-sticking adhesive on the cylindrical surface of the said core, a knife adjacent the core extending across the upper surface of the web leaving the core, and means for applying and drying a layer of self-sticking adhesive on the upper surface of a section of the web before it reaches the core.

12. Apparatus for transferring a moving flexible web to a roll core to start the winding of a web roll while the web is traveling to a roll that is being wound comprising a rotating drum for supporting the web traveling to the roll being wound, means for rotatably supporting a roll core with its cylindrical surface extending across and in contact with the upper surface of the moving web on the drum, a layer of dried selfsticking adhesive coverin the cylindrical surface of said core, a knife adjacent the core extending across and close to the upper surface of the web leaving the core, means permitting limited movement of the core circumferentially of the drum in the direction of web travel, and means for applying and drying a layer of selfsticking adhesive on the upper surface of the web before it reaches the core.

13. Apparatus for transferring a moving flexible web to a roll core to start the winding of a web roll while the web is traveling to a roll that is being wound comprising a rotating .drum for supporting the web traveling to the roll being wound, means for rotatably supporting a roll core with its cylindrical surface extending across and in contact with the upper surface of the moving web on the drum, a layer of dried selfstickin adhesive covering the cylindrical sur face of said core, a knife adjacent the core extending across and close to the upper surface of the web leaving the core. means permitting limited movement of the core circumferentially of the drum in the direction of web travel, means for applying and drying a layer of self-sticking adhesive on the upper surface of the-web before it reaches the core, and yielding tension means for the web approaching the drum for permitting limited changes in the speed of the web on the drum.

14. Apparatus for transferring a moving flexible web to a roll core to start the winding of a web roll while the web is traveling 'to-a roll that is being wound comprising means for supporting the web traveling to the roll. means for rotatably supporting a roll core with its cylindrical surface in contact with the moving web on said support and its axis extendin across the web, a knife extending across the Web adjacent its core contacting surface and close to the point where the web leaves the core, and means for applying adhesive to at least one of the contacting surfaces comprising the web and the core.

I means for applying adhesive to the core.

16. The method of severing a runnin web l and starting the severed end thereof around a core to wind the web into a roll which comprises moving the cylindrical surface of a rotatable core into contact with the running web whereby the core surface is accelerated to web speed,

holding the severing means across and close to the corecontacting surface of the web leaving the core and applying adhesive to the core contacting surface of the web approaching the core whereby the web is stuck to the core and the part thereof leaving the core is moved into the severing means and severed.

OSCAR. C. ROESEN. 

